Question

vă rog am nevoie repede dau coroană (a,b)!​

Answer 1

Răspuns:

Explicație pas cu pas:

a)

8 min = 5 x 60 = 300 s

30 min = 30 x 60 = 1800 s

1/4 min = 60 : 4 = 15 s

3/2 min = 60 : 2 x 3 = 90 s

1 h = 3600 s

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b)

1/2 h = 60 : 2 = 30 min

1/3 h = 60 : 3 = 20 min

1/12 h = 60 : 12 = 5 min

2/5 h = 60 : 5 x 2 = 24 min

5/6 h = 60 : 6 x 5 = 50 min

3/20 h = 60 : 20 x 3 = 9 min